Module presalytics.lib.plugins.matplotlib

Expand source code Browse git 
import json
import presalytics.lib.plugins.base as ext
import presalytics.lib.plugins.jinja as jinja

class Mpld3NumpyToJson(json.JSONEncoder):
    """
    Simplified Numpy encoder that returns json that mpld3 will understand 
    """
    def default(self, obj):
        import numpy as np
        if isinstance(obj, np.ndarray):
            return obj.tolist()
        return json.JSONEncoder.default(self, obj)


class Mpld3Plugin(ext.ScriptPlugin, jinja.JinjaPluginMakerMixin):
    __plugin_name__ = 'mpld3'

    __dependencies__ = [
        {
            'kind': 'script',
            'name': 'external_scripts',
            'config': {
                'approved_scripts_key': 'd3v3'
            }
        },
        {
            'kind': 'script',
            'name': 'external_scripts',
            'config': {
                'approved_scripts_key': 'mpld3'
            }
        }
    ]

    template = '<script type="text/javascript">mpld3.draw_figure("{{ id|safe }}",{{ fig_json }});</script>'

    def to_script(self, config, **kwargs):
        fig_json = json.dumps(config["figure_dict"], cls=Mpld3NumpyToJson)
        render_config = {
            'id': config["id"],
            'fig_json': fig_json
        }
        return self.render(render_config)

Classes

class Mpld3NumpyToJson (*, skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, sort_keys=False, indent=None, separators=None, default=None)

Simplified Numpy encoder that returns json that mpld3 will understand

Constructor for JSONEncoder, with sensible defaults.

If skipkeys is false, then it is a TypeError to attempt encoding of keys that are not str, int, float or None. If skipkeys is True, such items are simply skipped.

If ensure_ascii is true, the output is guaranteed to be str objects with all incoming non-ASCII characters escaped. If ensure_ascii is false, the output can contain non-ASCII characters.

If check_circular is true, then lists, dicts, and custom encoded objects will be checked for circular references during encoding to prevent an infinite recursion (which would cause an OverflowError). Otherwise, no such check takes place.

If allow_nan is true, then NaN, Infinity, and -Infinity will be encoded as such. This behavior is not JSON specification compliant, but is consistent with most JavaScript based encoders and decoders. Otherwise, it will be a ValueError to encode such floats.

If sort_keys is true, then the output of dictionaries will be sorted by key; this is useful for regression tests to ensure that JSON serializations can be compared on a day-to-day basis.

If indent is a non-negative integer, then JSON array elements and object members will be pretty-printed with that indent level. An indent level of 0 will only insert newlines. None is the most compact representation.

If specified, separators should be an (item_separator, key_separator) tuple. The default is (', ', ': ') if indent is None and (',', ': ') otherwise. To get the most compact JSON representation, you should specify (',', ':') to eliminate whitespace.

If specified, default is a function that gets called for objects that can't otherwise be serialized. It should return a JSON encodable version of the object or raise a TypeError.

Expand source code Browse git 
class Mpld3NumpyToJson(json.JSONEncoder):
    """
    Simplified Numpy encoder that returns json that mpld3 will understand 
    """
    def default(self, obj):
        import numpy as np
        if isinstance(obj, np.ndarray):
            return obj.tolist()
        return json.JSONEncoder.default(self, obj)

Ancestors

  • json.encoder.JSONEncoder

Methods

def default(self, obj)

Implement this method in a subclass such that it returns a serializable object for o, or calls the base implementation (to raise a TypeError).

For example, to support arbitrary iterators, you could implement default like this::

def default(self, o):
    try:
        iterable = iter(o)
    except TypeError:
        pass
    else:
        return list(iterable)
    # Let the base class default method raise the TypeError
    return JSONEncoder.default(self, o)
Expand source code Browse git 
def default(self, obj):
    import numpy as np
    if isinstance(obj, np.ndarray):
        return obj.tolist()
    return json.JSONEncoder.default(self, obj)
class Mpld3Plugin (**kwargs)

A script plugin incorporates whitelisted or local <script> tags into a rendered story

Expand source code Browse git 
class Mpld3Plugin(ext.ScriptPlugin, jinja.JinjaPluginMakerMixin):
    __plugin_name__ = 'mpld3'

    __dependencies__ = [
        {
            'kind': 'script',
            'name': 'external_scripts',
            'config': {
                'approved_scripts_key': 'd3v3'
            }
        },
        {
            'kind': 'script',
            'name': 'external_scripts',
            'config': {
                'approved_scripts_key': 'mpld3'
            }
        }
    ]

    template = '<script type="text/javascript">mpld3.draw_figure("{{ id|safe }}",{{ fig_json }});</script>'

    def to_script(self, config, **kwargs):
        fig_json = json.dumps(config["figure_dict"], cls=Mpld3NumpyToJson)
        render_config = {
            'id': config["id"],
            'fig_json': fig_json
        }
        return self.render(render_config)

Ancestors

Class variables

var template

str(object='') -> str str(bytes_or_buffer[, encoding[, errors]]) -> str

Create a new string object from the given object. If encoding or errors is specified, then the object must expose a data buffer that will be decoded using the given encoding and error handler. Otherwise, returns the result of object.str() (if defined) or repr(object). encoding defaults to sys.getdefaultencoding(). errors defaults to 'strict'.

Inherited members